Clippy fixes

src/core/instance.rs

@@ -28,9 +28,6 @@ impl Vertex for InstanceRaw {
         use std::mem;
         wgpu::VertexBufferLayout {
             array_stride: mem::size_of::<InstanceRaw>() as wgpu::BufferAddress,
-            // We need to switch from using a step mode of Vertex to Instance
-            // This means that our shaders will only change to use the next
-            // instance when the shader starts processing a new instance
             step_mode: wgpu::VertexStepMode::Instance,
             attributes: &[
                 // model matrix